ProjectionVersions GetProjectionVersions(string contractId)
{
try
{
if (string.IsNullOrEmpty(contractId))
{
throw new ArgumentNullException(nameof(contractId));
}
var persistentVersionContractId = typeof(PersistentProjectionVersionHandler).GetContractId();
if (string.Equals(persistentVersionContractId, contractId, StringComparison.OrdinalIgnoreCase))
{
return(GetPersistentProjectionVersions(persistentVersionContractId));
}
ProjectionVersions versions = inMemoryVersionStore.Get(contractId);
if (versions == null || versions.Count == 0)
{
var queryResult = GetProjectionVersionsFromStore(contractId);
if (queryResult.Success)
{
if (queryResult.Projection.State.Live != null)
{
inMemoryVersionStore.Cache(queryResult.Projection.State.Live);
}
if (queryResult.Projection.State.Building != null)
{
inMemoryVersionStore.Cache(queryResult.Projection.State.Building);
}
versions = inMemoryVersionStore.Get(contractId);
}
if (versions == null || versions.Count == 0)
{
var initialVersion = new ProjectionVersion(contractId, ProjectionStatus.Building, 1, contractId.GetTypeByContract().GetProjectionHash());
inMemoryVersionStore.Cache(initialVersion);
versions = inMemoryVersionStore.Get(contractId);
}
}
return(versions ?? new ProjectionVersions());
}
catch (Exception ex)
{
log.WarnException($"Unable to load projection versions. ProjectionContractId:{contractId}", ex);
return(new ProjectionVersions());
}
}
protected async virtual Task <ReadResult <ProjectionVersions> > GetProjectionVersionsAsync(string projectionName)
{
if (string.IsNullOrEmpty(projectionName))
{
throw new ArgumentNullException(nameof(projectionName));
}
var elapsed = new TimeSpan((long)(TimestampToTicks * (Stopwatch.GetTimestamp() - LastRefreshTimestamp)));
ProjectionVersions versions = inMemoryVersionStore.Get(projectionName);
//TODO: This optimization caused some problems
//if (elapsed.TotalMinutes > 5 || versions is null || versions.Count == 0)
{
var queryResult = await GetProjectionVersionsFromStoreAsync(projectionName).ConfigureAwait(false);
if (queryResult.IsSuccess)
{
if (queryResult.Data.State.Live != null)
{
inMemoryVersionStore.Cache(queryResult.Data.State.Live);
}
foreach (var buildingVersion in queryResult.Data.State.AllVersions.GetBuildingVersions())
{
inMemoryVersionStore.Cache(buildingVersion);
}
versions = inMemoryVersionStore.Get(projectionName);
LastRefreshTimestamp = Stopwatch.GetTimestamp();
}
if (queryResult.HasError)
{
return(ReadResult <ProjectionVersions> .WithError(queryResult.Error));
}
}
return(new ReadResult <ProjectionVersions>(versions));
}
ProjectionVersions GetPersistentProjectionVersions(string contractId)
{
if (string.IsNullOrEmpty(contractId))
{
throw new ArgumentNullException(nameof(contractId));
}
ProjectionVersions versions = inMemoryVersionStore.Get(contractId);
if (versions == null || versions.Count == 0)
{
var queryResult = GetProjectionVersionsFromStore(contractId);
if (queryResult.Success)
{
if (queryResult.Projection.State.Live != null)
{
inMemoryVersionStore.Cache(queryResult.Projection.State.Live);
}
if (queryResult.Projection.State.Building != null)
{
inMemoryVersionStore.Cache(queryResult.Projection.State.Building.WithStatus(ProjectionStatus.Live));
}
versions = inMemoryVersionStore.Get(contractId);
}
// inception
if (versions == null || versions.Count == 0)
{
var initialVersion = new ProjectionVersion(contractId, ProjectionStatus.Live, 1, typeof(PersistentProjectionVersionHandler).GetProjectionHash());
inMemoryVersionStore.Cache(initialVersion);
versions = inMemoryVersionStore.Get(contractId);
}
}
return(versions ?? new ProjectionVersions());
}
protected virtual ReadResult <ProjectionVersions> GetProjectionVersions(string projectionName)
{
if (string.IsNullOrEmpty(projectionName))
{
throw new ArgumentNullException(nameof(projectionName));
}
var elapsed = new TimeSpan((long)(TimestampToTicks * (Stopwatch.GetTimestamp() - LastRefreshTimestamp)));
ProjectionVersions versions = inMemoryVersionStore.Get(projectionName);
if (elapsed.TotalMinutes > 5 || versions is null || versions.Count == 0)
{
var queryResult = GetProjectionVersionsFromStore(projectionName);
if (queryResult.IsSuccess)
{
if (queryResult.Data.State.Live != null)
{
inMemoryVersionStore.Cache(queryResult.Data.State.Live);
}
foreach (var buildingVersion in queryResult.Data.State.AllVersions.Where(x => x.Status == ProjectionStatus.Building))
{
inMemoryVersionStore.Cache(buildingVersion.WithStatus(ProjectionStatus.Live));
}
versions = inMemoryVersionStore.Get(projectionName);
LastRefreshTimestamp = Stopwatch.GetTimestamp();
}
if (queryResult.NotFound)
{
versions.Add(new ProjectionVersion(projectionName, ProjectionStatus.NotPresent, 0, projectionHasher.CalculateHash(projectionName)));
}
}
return(new ReadResult <ProjectionVersions>(versions));
}
